Mullins, hani elshahawi3, birol dindoruk 3 and mohamed hashem. The wireline formation pressure measurement is acquired by inserting a probe into the borehole wall and performing a minidrawdown and buildup by withdrawing a small amount of formation fluid and then waiting for the pressure to build up to the formation pore pressure. These pressure measurements are useful in determining. Wireline formation testers evaluate vertical and horizontal permeability by conducting multiple pressuretransient tests. Comments from a sig meeting on unconventional reservoirs. Formation fluid testing involves taking fluid samples from the formation and measuring their. By combining multiple functions into a single unit, we can dramatically reduce the footprint of wireline operations on an offshore rig. The wirelineformationpressure testing and sampling program used a pumpthrough system and fluid analyser to monitor the flowing fluids over this zone of interest. Wireline formation testing and manufacturers of certified thermal insulation pdf book as2293 read online isbn 97819381684 pdf free at abc microsoft combook fundamentals of formation testing 06 fe 014 schlumberger allison gas turbine manual textbook of ayurveda. In the case of well testing the main issues which will be covered relate to fractured and layered reservoirs. Everything formation testing milestones in wireline. By combining multiple functions into a single unit, we can dramatically reduce the footprint of wireline.
Formation pressure observed after the drill bit penetrated casing. Pvt samples efficiently while minimizing sticking risks during data acquisition. Advanced applications of wireline casedhole formation. Wireline and whiledrilling formationtester sampling with oval. The formation testing tool 102 includes a probe 111 that may be extended from the formation testing tool 102 to be in fluid. Schlumberger wireline formation testing free download as pdf file. The ora intelligent wireline formation testing platform wft effectively integrates new digital hardware in a shorter toolstring for reliable performance even in hpht conditions.
This test is carried out by inputting an instrument probe inside the borehole wall and performing a mini draw down and buildup by withdrawing a small amount of formation fluid. The tool is primarily used to obtain formation pressures at chosen locations in an interval, and. This step can be optimized by deploying wireline formation tester to estimate the permeability of the coal layers in open hole. Weatherford offers modern technologiesincluding the reservoir evaluation system res and the compact formation sampler mftdto provide the. This paper used finite element method to simulate the pressure response of wireline formation tester applied in fractured reservoir. Additionally, this talk highlights the challenges one faces while planning, acquiring and interpreting pressure transient data from wireline formation testers, as well as the importance of realtime.
An improved formation testing method increases the accuracy of insitu formation pressure measurements by characterizing the mudcake properties. Back to the basics the fundamentals and then some of formation testing by julie anderson in times of frustration, coaches are famous for quoting the fundamentals. Over the past two decades, modern tools, such as mdt, rci, rdt, and frt, have emerged to become as one of the critical formation evaluation means in drilling projects with high costrisk and. The gradient and samples obtained from formation testing are crucial in determining thickness, quality, and connectivity of the hydrocarbon zone.
Extending the existing wireline technology requires a new pumping system capable of removing invasion fluids. Challenges and opportunities of wireline formation testing in. Wireline and whiledrilling formationtester sampling with. This operation is carried out in an open hole during wireline logging operations. Wilson6, mehran pooladidarvish7, yoshihiro masuda8, timothy s. We have developed a workflow to interpret formation permeability in a hydrocarbon reservoir with consideration of interlayers by numerically simulating the measured pumpout flow and pressure responses from wireline formation testing wft. Comparison of wireline formationtester sampling with focused and conventional probes in the presence of oilbase mudfiltrate invasion mayank malik1, carlos torresverdin1, kamy sepehrnoori1, richard jackson2, peter weinheber 2, oliver c.
We also offer offsite laboratory services for core and sample analysis by weatherford laboratories. Characterizing permeability with formation testers. Approximately 95% of horizontal wells are not logged. Specifically, after a formation tester is lowered to a desired depth within a wellbore, a pad is extended to gently abut and seal against the mudcake without disturbing the mudcake. In such cases, a wireline formation testing wet may present a viable alternative to acquire formationfluid samples and pressuretransient data wetpta, commonly known as a minidrillstem test.
How do ftwd and wireline formation testers wft compare. Comparison of wireline formationtester sampling with. Wireline formation testing and interpretation wft petroskills. Pdf multiprobe wireline formation tester pressure behavior in. The technology that makes the saturn 3d radial probe excel at fluid extraction also delivers a step change in formation pressure testing. Stewarts exhaustive explanations include the nuances of radial flow theory, examples of when to run production logs, and to well testing for drawdown in a comingled reservoir. Renowned petroleum engineer george stewart offers indepth information in his latest book, wireline formation evaluation and well deliverability.
Permeability from reservoir quality to the simulator. Pdf comparison of wireline formationtester sampling with. Formation water resistivity represents the resistivity value of the water uncontaminated by drilling mud that saturates the porous formation. Innovative extended spacing dual packer configuration of the wireline formation tester was deployed to selectively test coal layers ranging from 1 to 9 m deposited at shallow depths of 200900 m. The effect of thin layers is quantified by measuring at a length scale.
Fluid type, pvt data, fluid composition from lab tests pressure and temperature viscosity, gor, api asphaltene and wax content presence of h 2 s. In such cases, a wireline formation testing wet may present a viable alternative to acquire formation fluid samples and pressuretransient data wetpta, commonly known as a minidrillstem test. Hydrocarbon fluid identification, porosity characterization, and permeability are necessary input data for a strategy to determine intervals for drillstem tests and robust resource estimations. A new pressure rate deconvolution algorithm to analyze wireline formation tester and well test data. Formation evaluation capabilities versatile wireline unit halliburton s latest control unit is the industrys only wireline unit that is designed for open hole, cased hole and slickline operations. We offer a formation testing solution for nearly any application, including basic. Renowned petroleum engineer george stewart offers indepth information in his latest book, wireline formation testing and well deliverability. Spe reservoir evaluation and engineering, june 2012 demonstrates that minidsts can successfully forecast well deliverability multiple minidsts is now the prevalent form of layered well. Cased hole production testing with extended spacing. Formation testing and sampling tools fts with wireline and whiledrilling are widely used in explorationappraisal and reservoir development projects. This presentation addresses the reliability of wft pressure data to define proved reserves in light of the new regulations. This measurement can provide formation pressures along the borehole, thereby giving a measure of pressure with depth or along a horizontal borehole. Comparison with initial reservoir pressures in development.
This measurement can provide formation pressures along the borehole, thereby giving a. Figure 2 dual pretest formation tester sampling system. Then in 1975, the rft repeat formation tester added the capability to repeatedly measure formation pressure during a single trip. About the course formation testing and sampling tools fts with wireline and whiledrilling are widely used in explorationappraisal and reservoir development projects. After passing that filter, the best results of the test got a personal interview in english.
Inside the wellbore 202, the formation tester 200 resides within drilling fluid 204. In such cases, a wireline formation testing wft commonly known as a minidrillstem test minidst may present a viable alternative to acquire formation fluid samples and pressuretransient data. When the tool is being moved downhole, the formation tester is in its retracted. The wireline formation pressure testing and sampling program used a pumpthrough system and fluid analyser to monitor the flowing fluids over this zone of interest. The tool is primarily used to obtain formation pressures at chosen locations in an interval, and, with an accurate quartz gauge, permeability estimates may be obtained. Formation testing basics formation testing on wireline was developed in the mid to late 1950s to provide a faster and less expensive method of formation evaluation than conventional drill stem testing dst. Wireline formation testing and well deliverability. Integration of wireline formation testing and well test evaluation an example from the caspian, ramaswami, s. Telepresence technology links onsite logging trucks to the rig floor, cab, catwalk and remote centers. The importance of wireline formation testing wft interpretation increases with the new sec reserve definitions. Be in many places at once should issues arise, supervisors in remote centers back up onsite professionals. Comparison of wireline formationtester sampling with focused. It reduces time in the well by obtaining pressure profiles, as well. Analysis of modular dynamic formation test results from the mount elbert01 stratigraphic test well, milne point unit, north slope alaska brian j.
Pdf a new pressure rate deconvolution algorithm to. A familiarity with the basics of reservoir engineering and formation evaluation concepts. It reduces time in the well by obtaining pressure profiles, as well as fluid contact and mobility information to provide critical formation data as early as the first logging. Wireline formation testing and well deliverability books. This paper provides a general overview of casing perforating. Extending the existing wireline technology requires a new pumping system capable of removing invasion fluids and then filling singlephase sample chambers.
Enables formation pressure testing without wireline draw down rates, volume and build up times programmed prior to descent, based on historical field knowledge ability to pulse up hole a formation pressure and measurement when requested example final build up pressure to assist in data qc. Over the past two decades, modern tools, such as mdt, rci, rdt, and frt, have emerged to become as one of the critical formation evaluation means in drilling projects with high costrisk and high reward environme. These tools are capable of taking multiple samples of fluids and pressure measurements in the borehole without. The claims made by participants have not been verified or endorsed by epa. Wireline formation testing open hole logging schlumberger. The wireline apparatus 101 includes a formation testing tool 102 and a coring tool 103.
Modern reservoir engineering must accommodate for a complex set of heterogeneous phases contained in the well and petroleum reservoir. This five day course will consist of theoretical and practical classroom session with the last day of the course being devoted to wireline, logging while drilling lwd, and pressure volume temperature pvt lab to see formation testing ft tools and pvt lab facilitiesexperiments. Wireline formation testing in open hole can yield robust and reliable information about reservoir fluid type and productivity. One of the common methods of formation evaluation is based on lwdwireline log interpretation. The sp method ushie, fa department of geology, faculty of science, pmb 5323, uni versity of port harcourt, port harcourt, nigeria. Ftex advanced wireline formation pressure testing service. Download wireline formation testing and well deliverability. Formation testers are a class of wireline tools used to measure the downhole pressure of formations. Nov 02, 2018 how does the repeat formation test rft work. Pressure testing devices rft fmt rock and fluid sampling devices cst swc this sort of logging programme could be achieved in 4 or 5 runs over each open hole section. Ora intelligent wireline formation testing platform. Satellite, landlines or both establish full voice, video and data connectivity.
It gives information on the types and properties of fluids in the formation, indicates the. Aug 15, 2015 idiots tree felling fails with chainsaw machine tree falls on head and house duration. Well testing a tool run on an electric logging cable that pushes a probe into the formation, which then allows production into a small closed chamber. For instance, weather conditions may dictate a time window beyond which operations have to cease, as in arctic conditions. The highest performing conventional tools for pressurespecific formation testing can be applied in mobilities down to 0. It will be demonstrated that dual porosity behavior is never seen in carbonate. Pdf will wireline formation tests replace well tests. Casing perforating overview brad hansen devon energy the statements made during the workshop do not represent the views or opinions of epa. Pdf this paper presents new analytic solutions for the pressure behavior of the multiprobe wireline formation tester in layered reservoirs with. Comparison of wireline formationtester sampling with focused and conventional probes in the presence of oilbase mudfiltrate invasion. Over the past two decades, modern tools, such as mdt, rci, rdt, and frt, have emerged to become as one of the critical formation evaluation means in drilling projects with high costrisk and high reward environments. The realtime analysis identified a mix of obm filtrate and formation water. The efficient, reliable, and flexible performance of the ora platform not only improves on existing standards, but also makes formation testing a reality where not previously possible, including hpht conditions, tight or unconsolidated formations, and challenging fluids.
Crains petrophysical handbook wireline formation testing. It measures pressure at specific points on the borehole wall. Ability to pulse up hole a formation pressure and measurement when requested example final build up pressure to assist in data qc sample cleanup time limited by down hole battery drawdown 28 hrs alternative to lwd, traditional wireline formation testing when they are too costly, not available or. The bhge ftex advanced wireline formation pressure testing service delivers reliable and accurate pressure data by combining downhole automation with realtime control. Interpretation of formation permeability and pressure. Completions are often designed before the well is drilled. Finite element simulation of wireline formation tester applied in. A tool run on an electric logging cable that pushes a probe into the formation, which then allows production into a small closed chamber. Wft a or minidst uses a probe or a straddle packer to test a selected reservoir interval. Pdf characterizing permeability with formation testers.
Wireline formation tester supercharge correction method. However, operational or logistical concerns can sometimes preclude gathering a f. Stationary measurements of formation pressure in an open hole are made at any number of depths during a single trip into the hole. The saturn probe can extend this range down by an order of magnitude, to 0. The fundamentals and then some of formation testing in.
Integration of wireline formation testing and well testing. One recent version of these tools uses dual straddle packers in. Evolution of cased hole formation evaluation fe began with of course only open hole logs in 1927. The formation testing tool 102 is operatively connected to the coring tool 103 via field joint 104. Formation pressure testing in the dynamic drilling environment formation testing while drilling ftwd tools were introduced in 2002 and this new service has raised fundamental questions. Wireline formation testing wft have progressed considerably in the last two decades. Wireline formation testing and well deliverability pennwell. How does the drilling environment affect the measurement. Advanced applications of wireline casedhole formation testers adriaan gisolf, vladislav achourov, mario ardila, schlumberger. Us5644076a wireline formation tester supercharge correction. Drill stem testing dst or production tests wireline formation testers lwd formation testers surface samples at the wellhead or separator data acquired include.
Well test analysis group presentation video by 3rd year petroleum engineering students of petronas technological university. The sftt tool can also collect representative formation fluid samples for up to two test depths in one trip into the well. A wireline formation test is the test conducted by a wireline formation tester to measure the wireline formation pressure. Free interview details posted anonymously by schlumberger interview. A companion to his recent book, well test design and analysis, this newest technical volume covers the widest.